1.Premium Memory FoamOur office chair seat cushion is made of pure memory foam, soft and firm, uses your own body heat to adapt to your curves, ergonomic "U" shaped hollow design for superior comfort, effectively support the coccyx, relieve the hip pressure caused by sitting for long periods.2.ConvenienceNon-slip rubber bottom keeps the butt pillow in place even when moving on the seat. The machine washable zippered breathable cover is easy to clean, just remove the cover and toss in the washing machine. Built-in handle for easy transport.3.Multiple UsesThe chair pads supports the recovery of spinal problems such as lower back problems, disc herniation, coccyx injury, sciatica, etc. Large size (45*37*7.5cm) fits all types of chairs, great for office, home desk chairs, car seats, gaming chairs, mobility scooter, automotive seat, wheelchairs.4.Material SafetyThe memory foam of this seat cushion quickly rebounds and returns to its original shape after each use and can be used to add height to any seat.5.Work with Any ChairThis ergonomic seat cushion provides comfort for people who sit in chairs and face screens all day.